From: Chuck Lever chuck.lever@oracle.com
commit 13cb886c591f341a8759f175292ddf978ef903a1 upstream.
I've found that on occasion, "rmmod <dev>" will hang while if an NFS is under load.
Ensure that ri_remove_done is initialized only just before the transport is woken up to force a close. This avoids the completion possibly getting initialized again while the CM event handler is waiting for a wake-up.
Fixes: bebd031866ca ("xprtrdma: Support unplugging an HCA from under an NFS mount") Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Anna Schumaker Anna.Schumaker@Netapp.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- net/sunrpc/xprtrdma/verbs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -264,6 +264,7 @@ rpcrdma_conn_upcall(struct rdma_cm_id *i ia->ri_device->name, sap, rpc_get_port(sap)); #endif + init_completion(&ia->ri_remove_done); set_bit(RPCRDMA_IAF_REMOVING, &ia->ri_flags); ep->rep_connected = -ENODEV; xprt_force_disconnect(&xprt->rx_xprt); @@ -319,7 +320,6 @@ rpcrdma_create_id(struct rpcrdma_xprt *x int rc;
init_completion(&ia->ri_done); - init_completion(&ia->ri_remove_done);
id = rdma_create_id(&init_net, rpcrdma_conn_upcall, xprt, RDMA_PS_TCP, IB_QPT_RC);